40 Listen A ferris wheel at an amusement park completes one revolution every 40 seconds The cars can reach the maximum of 5 metres above the ground and a minimum of 1 metre above the ground The height h in meters above the ground can be modelled using a sinusodial function What is the radius of the ferris wheel a 4 meters Ob 5 meters Oc 2 5 meters d 2 meters